A201609 Primes of the form 7n^2 + 9.

37, 457, 709, 1381, 1801, 7177, 8101, 14821, 17509, 21961, 23557, 32377, 44809, 54217, 61861, 70009, 75721, 94201, 107641, 137209, 141157, 153337, 166021, 179209, 188281, 202309, 216841, 221797, 231877, 252709, 268921, 280009

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Mathematica

Select[Table[7n^2+9, {n, 0, 1000}], PrimeQ]

Prog

(Magma) [a: n in [0..400] | IsPrime(a) where a is 7*n^2+9];

Crossrefs

Sequence in context: A232046 A218376 A227825 * A140847 A081764 A142567

Adjacent sequences: A201606 A201607 A201608 * A201610 A201611 A201612

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 03 2011

Status

approved